SB2025101526 - Multiple vulnerabilities in Microsoft Azure Monitor Agent

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper access control (CVE-ID: CVE-2025-59494)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A local user can bypass implemented security restrictions and gain elevated privileges on the system.

2) Deserialization of Untrusted Data (CVE-ID: CVE-2025-59285)

CWE-ID: CWE-502 - Deserialization of Untrusted Data

CVSSv4: CVSS:4.0/AV:P/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data in Azure Monitor Agent. A local user can pass specially crafted data to the application and execute arbitrary code on the target system with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-59494
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-59285